BUS_NDAC
status |= BUS_NDAC;
status |= BUS_NDAC;
if ((lines & BUS_NRFD) == 0 && (lines & BUS_NDAC) == 0)
status |= BUS_NDAC;
status |= BUS_NDAC;
line_status |= BUS_NDAC;
status |= BUS_NDAC;
line_status |= BUS_NDAC;
line_status |= BUS_NDAC;
status |= BUS_NDAC;
status |= BUS_NDAC;